I think this may be what's going on with my friend:
The more Eights
build up their egos in order to protect themselves, the more sensitive they become to any real or imaginary slight to their self-respect, authority, or preeminence. The more they attempt to make themselves impervious to hurt or pain (whether physical or emotional), the more they “shut down” emotionally to become hardened and rock-like.
Level 5: Begin to dominate their environment, including others: want to feel that others are behind them, supporting their efforts. Swaggering, boastful, forceful, and expansive: the "boss" whose word is law. Proud, egocentric, want to impose their will and vision on everything, not seeing others as equals or treating them with respect.
Level 6: Become highly combative and intimidating to get their way: confrontational, belligerent, creating adversarial relationships. Everything a test of wills, and they will not back down. Use threats and reprisals to get obedience from others, to keep others off balance and insecure. However, unjust treatment makes others fear and resent them, possibly also band together against them.